175 results about "Protective lenses" patented technology

A protective lens cover assembly is provided. A protective lens cover assembly comprises a body, a first lens cover and a second lens cover. The first and second lens covers are connected to the body. The first lens cover has a first set of securing structures and a second set of securing structures. The second lens cover also has a first set of securing structures and a second set of securing structures. The first set of securing structures of one of the first lens cover and second lens cover is configured to engage the second set of securing structures of the other of the first lens cover and second lens cover.

The utility model relates to the technical field of measuring equipment, in particular to a laser leveling instrument which comprises an equipment shell, a supporting mechanism is arranged on the lower side of the equipment shell, and the supporting mechanism comprises a limiting groove, a positioning hole, a fixing plate, a positioning seat, an adjusting block, a supporting plate, a limiting rod, a positioning rod, a threaded rod, a side supporting plate and an anti-skid cushion block. A laser is fixedly connected to the left side of the equipment shell, a protective cover is fixedly connected to the left side surface of the equipment shell and located outside the laser, a protective mirror is fixedly connected to the surface of the protective cover and located on the left side of the laser, and an adjusting plate is arranged in the protective cover; the side supporting plate is matched with the supporting plate to support the laser leveling instrument, the stability of the laser leveling instrument is improved, the threaded rod is driven by the adjusting block to rotate, the supporting plate is pushed downwards, then the height of the laser leveling instrument is increased, the height of the laser leveling instrument is adjusted, and the adaptability of the laser leveling instrument to the working environment is improved.

The invention provides an endoscope working distance self-adaptive adjustable system, an endoscope imaging system and application. The endoscope working distance self-adaptive adjustable system comprises an image transmission lens sheath, a lens base, a protective lens sheath and a working distance auxiliary adjusting system arranged between the protective lens sheath and the lens base and / or arranged between the protective lens sheath and the image transmission lens sheath. The lens base protrudes in the axial direction to form a supporting part, and an imaging lens is arranged in the image transmitting lens sheath far away from the image side. The protective lens sheath comprises an outer sheath tube which axially extends out of the imaging lens, a sheath tube connecting part which partially sleeves the outer side of the supporting part and is connected with the outer sheath tube, and a protective lens which is arranged in the tail end of the object side of the outer sheath tube; the working distance auxiliary adjusting system is used for adjusting the relative axial position between the imaging lens and the protection lens and keeping the working distance between the protection lens and the imaging lens. By means of the working distance auxiliary adjusting system, the optimal object distance of the endoscope imaging system is achieved, and the microscopic imaging quality is ensured.

The invention relates to the technical field of monitoring cameras, in particular to an anti-fog waterproof all-weather intelligent monitoring camera. The anti-fog waterproof all-weather intelligent monitoring camera comprises an adjusting support, a shell, a mounting frame, a protective lens, a rain cover, a top frame, a core module and a controller, the shell is fixedly mounted on the adjusting support, the mounting frame is mounted on the left side of the shell, and the core module is integrated in the mounting frame. According to the scheme, an active heat convection demisting system is adopted, and compared with a traditional passive heating mode, the active heat convection demisting system has the following breakthrough improvement that filtered air is fed into the barrel to be heated through a fan, and after being rapidly heated through a heating wire, hot air forms directional airflow through a circuit board through hole; mist in the protective lens and the mounting frame can be quickly evaporated and removed in a short time, all areas in the mounting frame are covered by heat convection, and condensate water of components such as a lens and a circuit board is synchronously eliminated.

The invention discloses controllable metal welding equipment based on variable fluid scouring strength, and relates to the technical field of welding equipment, the controllable metal welding equipment comprises a workbench, a fixing groove is fixed to the upper end face of the workbench, and a first motor is fixed to the right side of the fixing groove. According to the controllable metal welding equipment based on the variable fluid scouring strength, through the arranged lens switching mechanism, the working positions of the two protection lenses can be automatically switched at the welding interval through ingenious cooperation of air cylinder lifting driving, an inclined face and a permanent magnet set, and therefore aging caused by the fact that laser beams continuously pass through the same lens area is effectively avoided; by means of the fluid adjusting mechanism, adjustment of the distance between the air outlet and the welding seam and adjustment of the cross section area of the air outlet are linked, when the wide welding seam needs to be adapted, the fluid adjusting mechanism can synchronously reduce the area of the air outlet and reduce the height of the air outlet, and therefore the airflow speed and the local scouring strength are remarkably improved under the condition that the airflow is not changed.

The invention relates to the technical field of thickness detection, in particular to a multifunctional detection device for lithium battery diaphragm production, which comprises a measurement detection frame, a detection assembly and a cooling assembly, and is characterized in that the center of the measurement detection frame is provided with a detection window, and the upper end in the detection window is provided with a mobile control cavity; when the detection mounting box moves left and right through the sliding control assembly to be matched with size detection and measurement, the protection assembly arranged below can be matched with accessed high-pressure air to achieve automatic cleaning of the high-transmittance protection lens and heat cooling of the laser receiving and transmitting module, the use stability and detection accuracy of the laser receiving and transmitting module in the detection mounting box are improved, and the detection efficiency is improved. Meanwhile, high-pressure air of the protection assembly flows into the cooling assembly, the battery diaphragm passing through the detection window can be cooled, the effectiveness of detected and measured numerical values is ensured, in addition, the sliding control assembly can achieve self-adaptive lubrication, the movement smoothness and reliability of the detection assembly are improved, and the functions are complete and reliable.

The utility model provides an eye protection structure for a metal cutting mask, which comprises a protection mask, a head band arranged on the protection mask and an eyepiece frame arranged on the protection mask, a protection lens is arranged on the eyepiece frame, two connecting blocks are arranged on one side of the protection lens, two fixing frames are arranged on one side of the eyepiece frame, and the connecting blocks are connected with the fixing frames. The two connecting blocks and the two fixing frames are located on the same vertical horizontal plane respectively, a connecting plate is arranged on the other side of the protective lens, fixing blocks are arranged on one side of the eyepiece frame, and the two connecting blocks are rotationally connected with the two fixing frames respectively. The protective effect on eyes of workers can be improved by arranging the protective lenses, the situation that the eyes of the workers are injured by sparks generated in the metal cutting process is avoided, meanwhile, the protective lenses can rotate by arranging the connecting blocks and the fixing frames, so that the workers can clearly observe workpieces through the eyeglasses, and meanwhile the connecting plates and the fixing blocks are arranged; and the protective lens and the eyepiece frame can be quickly fixed, so that a worker can conveniently cut metal.

1. The name of this design product: Protective glasses (FJ078). 2. Purpose of the product of this design: wearable cycling glasses. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

The invention discloses a large-span bridge deck slab deformation monitoring device and monitoring method, and particularly relates to the technical field of bridge monitoring, the device comprises a mounting device, a laser and a light spot recognition device, the laser and the light spot recognition device are mounted on the mounting device in a back-to-back manner, and the monitoring device further comprises a protective cover, a plurality of sets of heat dissipation guide pipes are fixedly installed in the protective cover, a heat dissipation air pump is further arranged in the protective cover, an air blowing cover and an air suction cover are arranged on the protective cover, the bottom ends of the heat dissipation guide pipes are in butt joint with an air outlet of the heat dissipation air pump, the top ends of the heat dissipation guide pipes are in butt joint with the air blowing cover, and the air blowing cover forms air flow from top to bottom on the surface of the protective lens. By means of the heat dissipation air pump, circulating air flow is formed in the heat dissipation guide pipe, the temperature difference gradient of the air temperature inside and outside the protective lens is reduced, the refraction problem affected by the too large air temperature difference between the inner side and the outer side of the protective lens is avoided, and the accuracy of the monitoring device is further improved.

The invention provides a laser processing vacuum observation device for rapidly switching protective lenses, and relates to the technical field of laser precision cutting and hole making devices, the laser processing vacuum observation device comprises a vacuum box, a laser precision cutting and hole making device, a laser precision cutting and hole making device, a laser precision cutting and hole making device, a laser precision cutting and hole making device and a laser precision cutting and hole making device, a laser; a pair of lens changing openings are formed in the quick lens changing rotary disc, lens mounting discs are arranged in the lens changing openings in a lifting mode, and light-transmitting lenses are mounted above the lens mounting discs in a threaded mode; and the lens cleaning mechanism is used for wiping and cleaning the light-transmitting lens by scraping and contacting the light-transmitting lens through a cleaning rotating rod. According to the invention, rapid and reliable switching between the working lens and the standby / cleaning lens is realized, the processing interruption time caused by replacing or cleaning the lens is reduced, the processing efficiency and the stability of the vacuum environment are guaranteed, a set of lens cleaning mechanism is arranged, the manual intervention frequency is obviously reduced, and the production cost is reduced. And the lens can be reused, so that the lens replacement cost is reduced.

The present invention relates to the field of drone technology, and specifically to a surveying and mapping drone with a lens protection device, comprising a protective mirror device, a shading device, and a lens connecting mechanism. In the lens connecting mechanism, an elastic rubber ring is compressed and deformed by a threaded connection portion, so that the lens connecting mechanism can be adapted to different models of camera lenses. A counterweight ball is used in the shading device to be connected to the shading aperture. The opening and closing states of the filter lens can be adjusted by adjusting the flight state of the drone. An air duct is provided in the protective mirror device so that air forms a wind curtain on the inner side of the protective lens, effectively preventing the protective lens from fogging, and by silencing, preventing the noise generated by air circulation from affecting the video. The present invention is simple and convenient to use, and has a wide applicability. While protecting the camera lens, it effectively prevents the protective lens from fogging, and can also prevent the camera from being overexposed, so that the drone can still work normally under strong light conditions, bringing convenience to surveying and mapping work.

1. Name of the product in this design: Diving mask (112). 2. Purpose of this design: Protective goggles worn during diving. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. The right view is symmetrical to the left view, so the right view is omitted.

The invention relates to the field of material testing, in particular to a thermal imaging detection device for an intelligent terminal, and the thermal imaging detection device comprises a detection mechanism which comprises a shell, detection equipment is arranged in the shell, two ends of the shell are respectively provided with a display screen and a protective lens, and the bottom of the shell is provided with a switch; the adjusting mechanism comprises a rotating disc on the shell, a fixing plate is arranged on the rotating disc, a groove is formed in the fixing plate, a grip is arranged at the bottom of the fixing plate, a cavity and a sliding groove are formed in the grip, an overturning part used for driving the shell to rotate is arranged on the fixing plate, and a stabilizing part is arranged in the sliding groove. The stabilizing part is provided with a pulling part used for releasing limitation of the shell, the stabilizing part is provided with an anti-falling part, and the anti-falling part is provided with a reset part. And the anti-fog mechanism comprises a circulation part on the shell. And through the arrangement of the detection mechanism, the adjusting mechanism and the anti-fog mechanism, the defect of the material can be tested by applying a thermal method under different conditions.

The utility model relates to the technical field of optical equipment, in particular to an optical densimeter and visibility all-in-one machine which comprises a base, a support is arranged at the top end of the base, a transmitting bin and a receiving bin are arranged on the left side and the right side of an inner cavity of the support respectively, and adjusting assemblies are arranged in inner cavities of the transmitting bin and the receiving bin. A transmitting cylinder and a receiving cylinder are arranged on the two adjusting assemblies correspondingly, a transmitting circuit board and a receiving circuit board are arranged at the ends, away from each other, of the transmitting cylinder and the receiving cylinder correspondingly, and protective glasses and cleaning assemblies are arranged at the ends, close to each other, of the transmitting bin and the receiving bin correspondingly. The optical densimeter and visibility all-in-one machine solves the problems that an optical densimeter and visibility all-in-one machine in the prior art cannot adjust the positions of a receiving lens cone and a transmitting lens cone in the actual use process, the flexibility is limited in the use process, and protective glasses cannot be cleaned; and residual dust on the protective glasses can influence the stability of the optical equipment.

The utility model relates to the field of vehicle security inspection equipment, in particular to a miniaturized low-maintenance railway wagon operation fault image detection device. Comprising a host, a camera lens is arranged in the host, one side of the host is fixedly connected with a power supply aviation plug and a signal aviation plug, a protective lens is fixedly installed on one side face of the host and located above the camera lens, and an automatic cleaning device used for cleaning the protective lens is installed on the host; the automatic cleaning device comprises a cleaning scraper rotationally connected to one side of the main machine, one side of the main machine is fixedly connected with a driving device used for driving the cleaning scraper to swing, and a windshield wiper is installed on the side, close to the protective lens, of the cleaning scraper. The problem that in the prior art, rain spots and oil stains often gather on the surface of a lens and cannot slide off in a rainwater-concentrated season, the lens is dirty, rainwater and the like, and consequently an application department cannot normally pass through TFDS vehicle inspection operation is effectively solved. Therefore, the online maintenance frequency can be reduced, and the cleaning efficiency is improved.

The utility model discloses a construction site flying dust protection mask which comprises a mask body, goggles are installed on the mask body, an air suction port is installed below the goggles, a plurality of air holes are formed in one end in the air suction port, one end of the air suction port is connected with a fixing ring, and the fixing ring is connected with an air inlet. An activated carbon filter disc and a net surface filter disc are respectively mounted in the fixing ring; a protective lens is mounted on the inner side of the protective frame, a mounting groove is formed in the joint of the protective lens and the protective frame, a moving plate is mounted at one end of the protective frame, and a silica gel scraper is connected to one end of the moving plate. Compared with an existing device, the dust protection mask for the construction site has the advantages that the goggles can be protected through the protection lenses, dust can be prevented from making direct contact with the protection lenses, the goggles are high-transmittance glass lenses, the protection lenses are high-transmittance plastic lenses, and the good visual effect can be achieved through combined use; and the protective lenses can be conveniently detached and replaced through the mounting grooves.

The invention belongs to the technical field of monitoring equipment, and particularly relates to a construction machinery operation carbon emission intelligent monitoring device which comprises two shells, and the inner walls of the shells are fixedly connected with controllers. When the monitoring device is used for monitoring carbon emission generated in the mechanical operation process in real time, an optical element on the surface of the device can be protected, and when splashing stones cause damage to a protective lens and influence the detection performance of the optical element, the situation can be found in time, so that the safety of the optical element is guaranteed. According to the method, the damaged protective lens is replaced, the detection accuracy of an optical element is guaranteed, an intelligent oil level gauge, an electric carbon meter, a GPS and an intelligent recognition algorithm technology are combined, the information of the mechanical operation state, the energy consumption, the operation track, the work area and the like is automatically collected, data are automatically processed and analyzed through a built-in carbon emission calculation method, and the detection accuracy is improved. And calculating to obtain the carbon emission generated by mechanical operation.

The utility model provides a full-focal-length type light supplementing camera which comprises a main body mechanism and a light supplementing mechanism. The main body mechanism comprises a shell and a mounting rack, the mounting rack is fixedly connected to one side of the shell, and a camera movement is mounted in the mounting rack; the light supplementing mechanism comprises a full-focus angle lens and a light supplementing protection lens, the light supplementing protection lens is fixedly connected to one side of the shell, a limiting piece is integrally formed on one side of the shell, the full-focus angle lens is clamped with the limiting piece, and a light guide column is installed on one side of the full-focus angle lens; the full-focal-length angle lens is arranged to be matched with the LED control circuit board and the light guide column for light supplement, and various focal lengths are designed on the full-focal-length angle lens, so that an effective light supplement light source can still be emitted at various distances and various angles; on the basis of a conventional single-angle light supplement camera, optimization and upgrading are carried out, and the problem of insufficient multi-scene light supplement is solved.

The utility model relates to the technical field of industrial camera protection, and discloses a protective device for an industrial camera, which comprises a sealing cover assembly, a protective tank assembly is mounted at the bottom of the sealing cover assembly, a convenient cleaning glass mirror assembly is mounted at the top of the sealing cover assembly, and a reinforcing assembly is mounted at the top of the protective tank assembly. According to the utility model, the convenient glass mirror cleaning assembly is arranged on the device, so that when the device is used, the pollution of the front protective lens can be conveniently cleaned, and the problem that the traditional lens is difficult to clean due to pollution can be avoided.

The utility model relates to 3D printing false tooth processing technical field, and disclose a kind of 3D printing false tooth auxiliary device, including lower bottom plate and telescopic link, still including upper bottom plate and lampshade, the upper end of lower bottom plate is fixedly connected with telescopic link, the upper end of upper bottom plate is rotatably arranged with rotating stand, the surface of rotating stand is fixedly installed with the protective lens for protecting worker's vision;The light irradiated by the fluorescent tube passes through glass plate and irradiates at the bottom of oral cavity model, since oral cavity model is the material of light transmittable, the light emitted from fluorescent tube is from the bottom of oral cavity model and transmits to the assembly groove of oral cavity model, so that worker can see the position of oral cavity model assembly groove, while ensuring assembly speed, worker need not give up position for illumination effect, the protective lens equipped on the surface of rotating stand can effectively protect worker's eye, and angle can be adjusted according to need, ensure that worker can comfortably observe assembly condition.

A laser emitting tool head comprises a lens barrel I, a lens barrel II arranged on the top of the lens barrel I, and a lens barrel III arranged on the top of the lens barrel II, wherein a protective sleeve matching the lens barrel I is arranged at the bottom of the lens barrel I, an inner sleeve I is arranged on the top of the protective sleeve, a protective lens is arranged on the top of the inner sleeve I, an inner sleeve II is arranged on the top of the protective lens, and a collimating lens is arranged on the top of the inner sleeve II; and O-rings are arranged between the protective lens and the inner sleeve I, and between the collimating lens and the inner sleeve II.

The utility model relates to AR (Augmented Reality) glasses convenient to disassemble, assemble and replace, which comprise a head band wearing piece, a device host and a main control computer, and the head band wearing piece and the main control computer are detachably connected with the device host; a supporting leg of the head hoop wearing piece is provided with an electric socket, and the main control computer is connected with the electric socket through a wire; a containing cavity is formed in the bottom of a shell of the device main machine, a detachable cavity cover plate is arranged in the containing cavity, and a double-diffraction optical machine assembly is detachably installed in the containing cavity. A detachable protective mirror is arranged at the bottom of a shell of the device host; a detachable thermal imaging lens assembly is arranged on the side face of the device host. The head hoop wearing piece can be detached from the device main machine to be replaced, the internal double-diffraction optical machine assembly is overhauled by opening the cavity cover plate of the accommodating cavity at the bottom of the device main machine, and the maintenance cost is reduced; a scratch-free protective mirror is easy to replace at the bottom of the device host; the thermal imaging lens assembly on the side face of the device host can be detached when not used and can be stored in a safe position, and the service life is prolonged.

The invention discloses a dual-band reflection optical film system and an optical lens. The film system comprises seven layers of all-dielectric optical films which are a trititanium pentoxide layer, a silicon dioxide layer, a trititanium pentoxide layer, a silicon dioxide layer, a zirconium dioxide layer, a trititanium pentoxide layer and a silicon dioxide layer in sequence, the reflectivity of the film system in the blue light band of 385-445 nm is 20-35%, the reflectivity in the near-infrared band of 780-1400 nm is larger than or equal to 40%, the reflectivity in the visible light band of 500-780 nm is smaller than or equal to 1%, and the film system is of an absorption-free structure. The film system is designed based on an all-dielectric pure interference structure, accurate regulation and control of multiband spectrums are achieved in a single film system, and the film system has the three characteristics of short-wave blue light blocking, near-infrared efficient heat insulation and extremely high visible light transmission. The invention fundamentally overcomes the technical bottlenecks of single function, heat accumulation caused by photo-thermal conversion, light transmittance damage and the like of the traditional absorption type protective lens, and is suitable for various visual protection products with strict requirements on color rendition degree and thermal protection.

The invention provides a method for testing the optical density of an absorption type laser goggles, and relates to the technical field of laser detection. The method for testing the optical density of the absorption type laser protective goggles comprises the following specific steps: S1, placing equipment: sequentially placing a laser light source, an attenuator, a polarization beam splitter prism, an aperture diaphragm I, a semi-transparent and semi-reflective prism, a photoelectric detector I, an aperture diaphragm II and a photoelectric detector II, other parts are arranged on the same straight line; s2, setting a light source: turning on a laser light source and preheating; and S3, releasing the light source: opening the aperture diaphragm I, and enabling the emergent light beam of the laser light source to enter the polarization beam splitter prism through the attenuator. A device for generating linear polarized light and monitoring the polarization state of a light beam entering the surface of the protective glass is introduced into a test light path, so that laser energy before and after a to-be-detected product is added does not generate large fluctuation, and the accuracy of an optical density detection result is further improved.

The utility model relates to the field of medical supplies, and discloses an anti-splashing eyeshade for bronchoscopy, which comprises a support plate, the front end of the support plate is provided with a support assembly, the support assembly comprises a support frame, the rear end of the support frame is fixedly connected to the front end of the support plate, the inner wall of the support frame is provided with a lens assembly, and the lens assembly is fixedly connected to the front end of the support plate. The lens assembly comprises a protective lens, the protective lens is inserted into the inner wall of the supporting frame, the front end of the supporting frame is fixedly connected with a sealing ring, the lens assembly further comprises a sealing gasket, the bottom end of the sealing gasket is fixedly connected to the top end of the protective lens, and the top end of the sealing gasket is fixedly connected with a supporting block. The whole device is fixed to the head of a patient through the elastic belt, the fixing stability can be improved, meanwhile, the detachable protection lens is used for shielding, the protection effect can be achieved, follow-up cleaning can be facilitated, sanitation is guaranteed, and the protection capacity of the whole device is good when the whole device is used.

The utility model discloses a camera with an anti-fogging effect, which relates to the technical field of cameras and comprises a camera main body. The upper end of the camera main body is provided with a shading plate, the surface of the front end of the camera main body is provided with a connecting base, the surface of the connecting base is provided with a slot, a limiting rod is inserted into the slot, the rear end of the limiting rod is provided with a protective mirror frame, and the rear end of the protective mirror frame is provided with a negative magnetic suction ring. According to the camera with the anti-fogging effect, compared with an existing common anti-fogging camera, the protective mirror frame and the connecting base are connected through the positive magnetic attraction ring and the negative magnetic attraction ring in a magnetic attraction mode, so that the anti-fogging effect is achieved, the anti-fogging effect is improved, and the anti-fogging effect is improved. The protective glasses frame can be stably fixed, and meanwhile, the protective glasses can be quickly dismounted when being maintained, so that the daily maintenance cost is reduced.

The utility model provides an automatic replacing device for vacuum laser welding protection lenses, which comprises a lens box and a rotating rod, the lens box is used for loading a certain number of protection lenses, the rotating rod comprises a rotatable push rod and a lens bearing tray, and a control system is electrically connected with the rotatable push rod and the lens bearing tray on the rotating rod. The rotatable push rod enables the lens bearing tray and the laser head lens insertion opening to be located at the same horizontal height. The lens box is additionally arranged, a certain number of lenses are loaded in the lens box, the control system is used for controlling the rotary rod, the rotary push rod is matched with the lens bearing tray, the to-be-replaced lens is fed into the laser head lens insertion opening, automatic replacement of the protection lens is achieved, manual replacement time is saved, and efficiency is improved.

The application discloses a medical goggle lens and a design method thereof, and belongs to the field of goggle lenses. According to the corresponding curves x(lambda), y(lambda) and z(lambda) of three cone cells of a human eye to a visible spectrum, three stimulus values are obtained by using a standard observer response function, the three stimulus values are normalized, the chroma is less than 0.1, the value range of x, y and z is 0.32-0.34, the laser wavelength to be cut off is obtained, the transmittance of other wavelengths is adjusted, corresponding x, y and z design values are obtained, the film system of an optical film is designed according to the x, y and z design values, and the corresponding film system is obtained. Through the above steps, the laser wavelength used in surgery is cut off in a specific wavelength range, the radiation of laser light is prevented from causing harm to the human eye, the transmittance is high, the chromatic aberration is small, the color of the film layer is close to colorless, and the color of the protective lens is reduced to interfere with medical staff.

The invention belongs to the technical field of lens protection equipment, and discloses a sensor optical lens protection device, which comprises a main body, a protection lens and a sliding group, the sliding set comprises an alternating moving strip, a moving part and a locking moving strip, the moving part drives the alternating moving strip to move through the connecting set, and two sets of telescopic assemblies are arranged on the alternating moving strip; a positioning pin and a positioning spring are arranged in the moving part, the tail end of the positioning pin is arranged in a first positioning hole in one end of the fixing strip in a penetrating mode, a second positioning hole is formed in the other end of the fixing strip, and the locking moving strip drives the control ring to rotate through meshing of the rack and the gear ring. And a connecting shaft on the positioning stop block penetrates through the limiting groove and is connected with a locking ring in the control ring. Through movement of the moving part, the locking moving strip drives the control ring to rotate, the protective lens is unlocked and locked, the alternating moving strip drives the protective lens to move, the automatic replacement process of first unlocking, then alternating, locking and then resetting is achieved, and manual operation is not needed.

The utility model relates to the field of welding masks, and discloses a special-shaped pin equipment welding mask which comprises a safety helmet, a mask body is fixed on the lower portion of one side of the safety helmet, the mask body extends forwards from the side portion of the safety helmet to the front half side of the safety helmet to cover the face, and protective glasses are installed on the upper portion of the mask body. The special-shaped pin fixing device has the advantages of being good in air permeability, capable of being operated by a single person, wide in visual field, convenient to observe the fixing position of a special-shaped pin, good in protection performance, capable of improving working efficiency and capable of saving labor cost.